Default Gateway

[Sam]

I accidentally changed the default gateway on my PC from
255.255.255.0 to 255.0.0.0. IP address of my PC is
192.168.1.x. everything worked fine including Internet.
Only problem was I couldn't browse some secured sites like
CITIBANK.COM. I know DG should be class C but how come it
only affected browsing to secured sites?
Thanks

 

[John Wunderlich]

I accidentally changed the default gateway on my PC from
255.255.255.0 to 255.0.0.0. IP address of my PC is
192.168.1.x. everything worked fine including Internet.
Only problem was I couldn't browse some secured sites like
CITIBANK.COM. I know DG should be class C but how come it
only affected browsing to secured sites?

First, you didn't change your "gateway", you changed your "subnet
mask".

With an IP of 192.168.1.x and a mask of 255.255.255.0, you are saying
in effect that any IP address that is 192.168.1.x exists in the local
network and any other address should be sent out to the internet.

With an IP of 192.168.1.x and a mask of 255.0.0.0, you are saying that
any IP address that is 192.x.x.x is on the local network and all other
addresses should be sent out to the internet.

www.citibank.com happens to have an IP address of 192.193.195.247
(which happens to start with "192"). By changing your subnet mask to
255.0.0.0, you have in effect declared that Citibank is on your local
network and therefore packets shouldn't be sent out to the internet.
Guess what ... you will never be able connect to any internet address
that happens to start with 192.

HTH,
John

 

[Guest]

-----Original Message-----


First, you didn't change your "gateway", you changed your "subnet
mask".

With an IP of 192.168.1.x and a mask of 255.255.255.0, you are saying
in effect that any IP address that is 192.168.1.x exists in the local
network and any other address should be sent out to the internet.

With an IP of 192.168.1.x and a mask of 255.0.0.0, you are saying that
any IP address that is 192.x.x.x is on the local network and all other
addresses should be sent out to the internet.

www.citibank.com happens to have an IP address of 192.193.195.247
(which happens to start with "192"). By changing your subnet mask to
255.0.0.0, you have in effect declared that Citibank is on your local
network and therefore packets shouldn't be sent out to the internet.
Guess what ... you will never be able connect to any internet address
that happens to start with 192.

HTH,
John
.

Thank you,